He played for Velež Mostar and Bursaspor, making over 280 league appearances and scoring 13 goals.
Since August 2019, Kalajdžić has been working as an assistant manager of Feđa Dudić in Velež.
Born in SFR Yugoslavia, Kalajdžić started playing professional football for local side Velež Mostar.
In 1988, Kalajdžić moved to Turkey, joining Süper Lig side Bursaspor.
He worked as an assistant coach in the Bosnia and Herzegovina U21 national team from 2011 to 2012 and at Velež during 2014.